Method of treating prostatic hypertrophy

ABSTRACT

ORALLY ADMINISTERED COMPOSITIONS FOR TREATING PROSTATIC HYPERTROPHY ARE DESCRIBED HEREIN, THESE COMPOSITIONS CONTAINING AN EFFECTIVE DOSE OF A HEPTAENE POLYENE MACROLIDE. ALSO THE METHOD OF TREATING PROSTATIC HYPERTROPHY WITH SUCH COMPOSITIONS, IS DESCRIBED HEREIN.

United States Patent Oihce 3,584,118 METHOD OF TREATING PROSTATIC HYPERTROPHY Harry W. Gordon, Bronx, N.Y., assignor to Julius Schmid, Inc., New York, N.Y.

No Drawing. Continuation-impart of application Ser. No. 544,712, Apr. 25, 1966. This application Mar. 17, 1967, Ser. No. 623,847

Int. Cl. A61k 21/00 US. Cl. 424--117 ABSTRACT OF DISCLOSURE Orally administered compositions for treating prostatic hypertrophy are described herein, these compositions containing an effective dose of a heptaene polyene macrolide. Also the method of treating prostatic hypertrophy with such compositions, is described herein.

RELATED APPLICATIONS This application is a continuation-impart of copending application Ser. No. 544,712 filed Apr. 25, 1966, now abandoned.

BACKGROUND OF THE INVENTION (1) Field of the invention This invention relates to a composition containing a polyenic macrolide compound and the method of treating prostatic hypertrophy by orally administering the same.

(2) Brief description of the prior art It is known that prostatic hypertrophy may in limited cases be treated by the administration of hormones such as steroids. However, the treatment with steroids or other hormones is severely restricted since its effect is related to the suppression of the secretion of a gonadotropic substance by the adrenal cortex. Further, the administration of a hormone carries with it extensive physiological effects on the organ and organ systems in addition to the prostate. Therefore, there has not'been available a composition for the treatment of prostatic hypertrophy which has a broad spectrum of effectiveness independent of the cause of the prostatic hypertrophy.

A great number of polyenic macrolide antibiotic compounds are known today which are used or proposed for use as antifungal chemotherapeutic agents and which have been the subject of extensive scientific investigation in past years. Biologically, the polyene macrolide antibiotics have been recognized to be potent chemotherapeutic agents against a wide variety of yeasts and fungi. However, the use of these polyenic macrolide compounds for the treatment of certain fungal infections has been limited by their poor oral absorption from the gastrointestinal tract. The application of these polyenic macro- 9 Claims 3,584,118 Patented June 1971.

lide antibiotic compounds has been restricted primarily to topical use.

It has now been unexpectedly discovered that the oral administration of a heptaene polyene macrolide has a selective effect on the prostate gland in mammals which does not appear to express its effect by stimulating or suppressing hormonal producing endocrine glands. Its effect on the prostate is carried out by reducing its size and altering its hypertrophic histological picture and texture to that of a normal appearing gland. This effect is believed not due to the antibiotic function of these polyenic macrolide compounds but apparently to their chemical structure. v

Accordingly, one aspect of the present invention is to provide a method for the treatment of prostatic hypertrophy which comprises orally administering an effective dose of a specific known heptaene polyenic macrolide compound.

Another aspect of the present invention is to provide an orally administered composition for the treatment of prostatic hypertrophy which composition comprises a pharmaceutical formulation comprising an effective dose of a specific known heptaene polyenic macrolide compound.

An additional aspect of the present invention is to provide an enteric tablet or capsule containing an effective dose of a composition of the present invention for the treatment of prostatic hypertrophy.

Other aspects of the invention will be apparent from the following detailed description.

The compositions claimed herein for the treatment of prostate hypertrophy in mammals comprise a material selected from the heptaene polyenic macrolides candicidin, amphotericin B, fungimycin, trichomycin, hamycin, candidin and ayfactin.

The known polyenic macrolide compounds have been produced as anitbiotics by cultivation of Streptomyces in different media and by extraction of the substances from these cultures. It has been demonstrated in the literature that the known polyenic compounds are -(1) a fairly high molecular weight (ca. 700-1500), (2) contain 1 macrocyclic lactones, better known as macrolides (hereinafter referred to as polyenic macrolide compounds), and (3) each possess a chromophore in the nucleus of from four to seven conjugated double bonds (tetraenes, pentaenes, hexaenes, and heptaenes) identified by examination of their ultra-violet absorption spectra. These conjugated systems are generally unsubstituted (except the methyl pentaenes) and either of the all-trans or cistrans configuration. Based on the evidence available to date, it is indicated that the known polyenic macrolide compounds contain a twenty-six to a thirty-seven membered lactone ring wherein all of the ring atoms except the single oxygen atom are carbons. The evidence to date also indicates that only C, H, O, and N are present in the known polyenic macrolide compounds.

The polyenic macrolide nucleus contains a relatively planar lipophilic section (polyenic chromophore) and a less rigid hydrophilic section due to the presence of highly polar substituents, particularly hydroxyls, as well as other substituents which will be discussed in detail later herein. All of the known polyenic macrolide compounds contain at least one hydroxyl moiety and in some cases at least six hydroxyl moieties.

The following articles should be consulted for references to the discovery, isolation and chemical properties of the polyenic macrolide compounds:

(1) Vining, The Polyene Antifungal Antibiotics Hindustan Antibiotics Bull, vol. 3, pp. 32-54 (1960).

(2) Waksman et al., The Actinomycetes, Vol. III, Antibiotics of Actinomycetes (Williams and Wilkins, Baltimore, 1962).

(3) Droughet, 'Noveaux Antibiotiques Antifongiques Symp. Int. Chimiotherapie, Naples, 1961, pp. 21-50 (1963).

(4) W. Oroshnik et al., Fortschritte der Chemie Organischer Naturstoffe, Vol. XXI, pp. 18-79 (1963).

The heptaene polyene macrolides claimed herein are classifiable into the following groups:

(A) Aromatic I-Identified as those compounds containing the heptaene macrolide nucleus, one carboxyl group, a single amino sugar moiety (mycosamine) glycosidically linked to the macrolide nucleus and an aromatic amino moiety (p-aminophenyl) aldolically linked to the macrolide nucleus. Representatives of this group are (a) candicidin which may possibly be identical to trichomycin A, hamycin (minor component); (b) trichomycin B which may possibly be identical to levorin A hamycin (major component).

(B) Aromatic II-Identified as those compounds containing the heptaene macrolide nucleus, one carboxyl group, an amino sugar (mycosamine) glycosidically linked to the macrolide nucleus, and an aromatic amino moiety (N methyl p aminophenyl) aldolically linked to the macrolide nucleus. Representative polyenic macrolides of this group are: (a) candimycin, and (b) hamycin (minor component of hamycin complex).

(C) Aromatic III*Identified as those compounds containing the heptaene macrolide nucleus, an aromatic amino moiety (N-methyl-p-aminophenyl), aldolically linked to the macrolide nucleus, and an amino sugar (perosamine), glycosidically linked to the macrolide nucleus. It is noted that the aromatic amino moiety just identified has previously been incorrectly reported in the literature as a paminobenzyl moiety. Representative of this group is fungimycin. This substance was originally styled by antibiotic number NC 1968 and for a brief interval identified as perimycin and aminomycin.

(D) Non-Aromatic--Identified as those compounds containing the heptaene macrolide nucleus, one carboxyl moiety and a single amino sugar (mycosamine), glycosidically linked to the macrolide nucleus. Representative of this group are: (a) candidin; (b) and amphotericin B not as yet been sufiiciently characterized as to all the substituents linked to the polyenic macrolide nucleus. These heptaene macrolides includes ayfactin A, ayfactin B.

It will be understood that where a polyenic macrolide compound of the class herein described is identical with one of the above named compounds, but has been known by another name by reason of independent production or production in accompaniment to other antibiotics, the identification of such substances by the name set forth above is intended to mean the same compound under all other designations.

In the preparation and administration of dosages, a variety of pharmaceutical formulations may be employed, such as capsules, or tablets, preferably in enteric form. The quantity of effective dose supplied by each capsule or tablet is relatively unimportant since the total dosage can be reached by administration of either one or a plurality of capsules or tablets or both. The capsules employed may compromise any well known pharmaceutically acceptable material such as gelatin, cellulose derivatives, etc. The tablets may be formulated in accordance with conventional procedure employing solid carriers, lubricants, etc., well known in the art. Examples of solid carriers are: starch, sugar, bentonite and other commonly used carriers.

The following examples illustrate suitable pharmaceutical formulations containing the compounds of this invention.

EXAMPLE 1 Hard gelatin capsule available from the Robin Pharmacal Corporation (size 00) is filled with about 0.83 gram of lactose (Fast Flow available from Foremost Dairies, Inc.) and about mg. of active material, the lactose and active ingredient being triturated together in a pestle and mortar until a very fine yellow amorphous powder resulted, prior to filling of the capsule. Obviously, any desired. number of capsules may be filled by mixing together any amount of lactose and active ingredient in the same weightv ratio indicated above so that each capsule will contain 100mg. active ingredient; and the quantity of active ingredient may be altered, as'desired, by varying the weight ratio of the indicated materials.

EXAMPLE 2 g. of corn starch and 2112.5 g. lactose are dried at F. for 12 hours before compounding. After drying, each of these materials is sifted through a No. 14 mesh stainless steel screen. The sifted corn starch and lactose are thoroughly mixed for 30 minutes and to this mixture there is added a blended mixture of 250 g. active ingredient and 12.5 g. magnesium stearate. This admixture is blended and then compressed on a tableting machine into 5000 substantially round tablets each containing 50 mg. active ingredient and Weighing about 500 mg.

EXAMPLE 3 Enteric tablets for use in this invention may be formulated as follows:

16 g. of powdered corn starch (U.S.P. quality) is dried at 120 F. for 12 hours and passed through a No. 25 mesh stainless steel screen. The sifted corn starch is then mixed with 255 g. of anhydrous lactose (direct tablet grade). To this mixture, 4 g. of magnesium stearate is added followed by 50 g. of the active ingredient. These materials are then mixed in a small pebble mill for 30 minutes and compressed on a single punch machine producing 1,000 tablets, each containing 50 mg. active ingredient. Each tablet weighs approximately 325 mg. The average hardness is 6, as measured on a'Monsanto Hardness Tester.

The tablets are then placed in a coating pan rotating at 29 r.p.m. and subjected to warm air of approximately 80 F. for about 10 minutes. Then 30 cc. of a pharmaceutical glazed composition is applied, this composition being refined wax and rosin free orange flake shellac with anhydrous alcohol as the medium therefor. Talcum (U.S.P.) or similar dusting powder is applied to the tablets to prevent the tablets from sticking to each other or to the pan and this procedure is followed after the application of each coat to the tablets. The coat is allowed to dry for approximately one hour. Thereafter three-additional coats are applied in a similar manner, each coat comprising 30 cc. of the pharmaceutical glaze, with approximately one hour of drying time between the application of successive coats. After four coats are applied the tablets are dried overnight at room temperature and then four more coats are applied in the same manner using the same composition. Each coat is allowed to air dry for 3 hours before applying the next coat. Each of the 8 coats of the enteric tablets is approximately 0.001 inch in thickness. Obviously, the thickness of the coating can be controlled by varying the concentration of the pharmaceutical glaze in the alcohol medium.

The enteric tablets are tested in accordance with. the in vitro disintegration test for entericcoated tablets described in U.S.P. XVII and Were found to pass this test.

While the number of coats used in the example heretodemonstrate the effectiveness of the polyenic macrolide compounds in reducing the size of the prostate gland.

Inone study, ten dogs were used to determine the action of candicidin, the results of which are reported in Table I fore described is 8, it will be appreciated that there are below. many factors to be considered which permit variation Each dog was examined for the gross presence of proin the number of coats, including the size and shape of static hypertrophy by palpation. All of the dogs, with the tablets or capsules, the type of coat or combination the exception of two, were at least ten years of age. The of coats, etc. dogs were housed under kennel conditions for a week Other procedures and materials well known in the prior prior to the oral administration of candicidin. During the art may be employed to prepare suitable enteric coatings. acclimatization period the dogs became adjusted to the The selection of the coating substance is governed to a feeding of kennel routine. A thorough examination of the large extent by pH and enzyme considerations and the dogs, including electrocardiography, was undertaken durdesire to have the enteric composition disintegrate or ing the acclimatization period. Four of the dogs exhibited dissolve when it reaches the duodenum region of the a cardiac condition, not unusual for older dogs, which intestinal tract and not in the stomach. The disintegration was confirmed by electrocardiography and subsequently or dissolution of an enteric coating in the intestinal tract at necropsy. This cardiac condition did not affect the usually depends on several factors, the most important course of the experimental trial and indeed was helpful of which are (1) the presence of acidic groups in the in establishing that even in the presence of such a conenteric substance which cause it to he insoluble in the dition candicidin maybe safely administered. l R envlronment of Stomach but Soluble 111 h After the one week acclimatization period, a surgical intestinal tract due to the higher (but usually not alkali) laparotorny was performed on each of the dogs under P of the medla there and the Teslstance of the coat general anesthesia. The prostate gland was measured in mg to attack by oral and gastric enzymes. three dimensions, lateral, cranial-caudal and dorsal-venlllustratlve Of Other l known Substance that y be tral and was palpated to determine its consistency. Visual used for the coatlqg are the f11W1ng I Cellulose observation of the bladder, intestines, the caudal pole of acetate phthalate with resinous carrier; cellulose acetate h kid d spleen were made, and the palpation of phthalate-tolu-balsam-shellac; cellulose acetate phthalate the hvel. and kidney was accomhhshed In all but three with fats and waxes; shellac-castor o1l; ammomated of the dogs a punch biopsy of the prostate was taken shellac; shellac-stearlc ac1d-tolu-balsam;stear1c acrd-castor The biopsy Specimen taken from the left hemisphere of oil over shellac-silica gel, cellu lose ace(t1ate ph lg i? the prostate gland was fixed in formalin for histological or withoiit p astitfnzert and tllSflilg pow er(s)1, ac1 a and microscopic examination. The omission of a biopsy ates 0 g q 2 ctopo g p in three dogs was instituted as a control to determine 3. of of phthalate etc y p y y gland might have some influence on inflammation and For a description of the procedure for manufacturing Slze of i i In g lgl blood Speck enteric formulations such as those exemplified heretofore, w a en or can m m assay an routme reference should be 'made to US. Pats. Nos. 2.196.768: ammatlon' 2,433,244; 2,455,790; 2,540,979; 2,858,252; 3,080,346 and 40 The dogs were permitted to recover from the surgical British Paw NOS. 760,403 and 820,495 laparotomy following Wh1ch each of the dogs Was placed The effectiveness of the compounds of this invention in on a of oral admlmstratlon of q g q treating prostatic hypertropy h b fi d by tests eordance with the schedule of dose administrauon given in large mammals, i.e., those Weighing at least about 1 In Table I The drug Was admlllistered ill a a kilogram. For example, tests were conducted on dogs to 45 ge atin Capsule in the animal feed.

TABLE I Percent decrease Animal Prostate Size, mm. in gland Daily body size from Age dosage Dose weight Cranial- Dorsalinitial Dog No Procedure (years) (mg) (days) (lbs) Lateral caudal ventral volume 151; laparotomy r 53 45 1 {2nd laparotorny 1013 2 100 30 40 40 35 40 11. 0 Autopsy 2 200 20 41 42 31 7 1st laparotomy. 25 20 2O 15 2 n lznd laparotomy 4 2 100 30 20 17 17 10 51. 5 Autopsy- 3 0 20 20 17 19 14 24. 5 1st laparotomyl 55 26 30 25 3 {2nd laparotomy 13 2 100 30 44 26 30 22 12.0 Autopsy r 3 400 14 36 26 25 25 17. 0 1st laparotomy 72 50 40 4 {2nd laparotomynh 10 2 100 30 61 41 39 32 48. 8

1 The prostate volume is approximated by multiplying the three dimensions indicated. 2 The daily dosage administered after the first laparotomy. 3 The daily dosage administered after the second laparotomy.

4 N0 biopsy taken.

As indicated in Table 1 a second surgical laparotomy was performed on four of the ten dogs in lieu of autopsy because these four dogs were subsequently continued on an altered dose of candicidin to determine whether increase of the drug dose or discontinuance of dosage would further affect prostate size. The remaining six dogs were sacrificed and autopsied after completion of the administration of candicidin. The four dogs on which a second laparotomy was performed were autopsied after completion of the administration of candicidin for the period specified in the above table.

At the time of the second laparotomy and at necropsy the prostate gland was measured and biopsy speciments of the prostate gland of each dog were taken, with the exception of the three dogs indicated in the table for which no biopsy speciments were taken.

, In addition, at necropsy, histologic specimens were taken of the general organs-prostate, bladder, pancreas, kidney, adrenal, liver, spleen, testes, intestines, caecum, lung, thyroid and heart for further microscopic examination in order to determine whether any toxic reaction had occurred. All tissues taken were formalin fixed and prepared for microscopic examination. The histologic study of the organs listed did not reveal any evidence of drug toxicity.

At necropsy, blood and urine samples were obtained for assay. The assay method was essentially the procedure described for the assay of Nystatin-Candicidin in Assay Methods of Antibiotics 1955, a laboratory method. Donald C. Grove and William D. Randall, pp. 1l6ll9: Method 2. The examples of dog serum and urine investigated microbiologically showed no antifungal activity. The assay tests establish the absence of candicidin in the blood and urine of the test animals.

As shown in the above table, the trauma induced by taking of a biopsy of the prostate gland was not the cause of the reduction in the size of the prostatic tissue. The gross appearance and measurements of the prostate gland taken prior to the administration of candicidin and at laparotomies performed after the drug had been administered revealed a marked reduction of the size of the prostate gland and normal consistency of the gland which is consistent with a significantly younger age of dog. Microscopic examination of the biopsy specimens of the prostate gland on each dog taken at each of the surgical procedures performed confirmed the gross observation of normal appearance and a substantial reduction of size.

The histologic evaluation of the prostate biopsies of dogs taken prior to candicidin administration and at laparotomies did not reveal any cytotoxicity in the gland. The enlarged prosate gland prior to drug administration is characterized by considerable epithelial tufting or papillation; cells are tall, columnar with granular cytoplasm, and gland acini are compressed. The marked reduction in the size of the prostate gland after candicidin administration is accompanied by a decrease in the size of the columnar epithelial cells which are mostly cubiodal; diminished or absent granularity; and papillations are reduced or absent.

As indicated in the above table, body weight loss does not appear to be related in any quantitative way to the dose of the drug administered since the dogs that received 100 mg./day showed a body weight loss no less or greater than those animals receiving a higher dosage. The data also show that a short time of administration, as noted with dog No. 8 of a relative high dose, 300 mg. daily, for five days, effected a significant reduction in size of the prostate gland. In the case of dog No. 2, candicidin administration was discontinued after the second laparotomy as indicated in the table and after an additional days of absence of drug administration, it was found that the prostate gland began to increase in size and had achieved about a fifty percent return towards the volume noted at the start of the experiment. However, in this dog the prostate gland was not initially pathologically enlarged.

In some of the dogs diarrhea and vomiting occurred upon the oral administration of candicidin but these effects appeared to be overcome when the dogs were fed a supplement of vitamin B-complex and lacto-bacilli.

Other tests conducted with polyenic macrolide compounds in mammals appear to indicate that the larger the chromophore in the macrolide nucleus and more effective is the compound in treating prostatic hypertrophy. Accordingly, the heptaene macrolide compounds are pref erably used because they have been found to generally give the best results whereas the tetraene macrolide compounds, generally, are least effective in reducing the size of the prostate gland.

It is also indicated that cleavage or other alteration of the macrolide nucleus which opens the lactone ring will destroy the activity of the compounds as will alteration of the chromophore present in the nucleus by total hydrogenation.

Since no one of the substituents found in the polyenic macrolide compounds such as amino sugars, aromatic amines, carboxyls, carbonyls, methyls, aliphatics, epoxies, etc., occurs in all of the polyenic macrolide compounds described herein, this suggests that these substituents, except for the hydroxyl function, are not essential for achieving a reduction in the size of the prostate gland, but rather that the active structure is the macrolide ring containing a conjugated chromophore portion (lipophilic section) and the flexible hydrophilic portion.

Tests conducted with various polyene macrolide compounds including, amphotericin B and fungimycin, indicate that the side chain groups commonly found in the polyenic macrolide compounds are not essential to activity for treating prostate hypertrophy.

It is preferred, commensurate with the desideratum of obtaining the highest degree of effectiveness of the compositions of this invention per given dose of active ingredient, to use an enteric tablet or capsule. Thus when using a specific known polyene macrolide compound in the form of an enteric solid, the entire compound will remain intact when it reaches the intestinal tract so long as the enteric coating composition retains its integrity in the stomach. On the other hand, administration of the same dose in a standard solid pharmaceutical formulation may result in a cleavage of any amino sugar present, or of other groups similarly sensitive to gastric conditions, Such cleavage may further result in alteration of the polyenic macrolide nucleus, thereby diminishing the effectiveness of the active ingredient.

The effective dosage of the compounds of this invention depends upon the severity of condition, the stage and the individual characteristics of each mammal being treated. It is expected that the compositions will generally be administered in a dosage range from about 1 mg. to about mg. active ingredient per kg. of body weight per day and preferably from about 5 mg. to about 40 mg. per kg. of body weight per day.

What is claimed is:

1. A process for the treatment of prostatic hypertrophy in a mammal afflicted with prostatic hypertrophy which comprises orally administering to said mammal an effective dose for treating prostatic hypertrophy of candicidin.

2. A process according to claim 1 wherein said candicidin is administered in enteric coated form.

3. A process according to claim 1 wherein said effective dose comprises about 1 to about 40 mg. per kg. of body weight per day.

4. A process for the treatment of prostatic hypertrophy in a mammal affiicted with prostatic hypertrophy which comprises orally administering to said mammal an effective dose for treating prostatic hypertrophy of amphotericin B.

5. A process for the treatment of prostatic hypertrophy in a mammal afilicted with prostatic hypertrophy which comprises orally administering to said mammal an elfective dose for treating prostatic hypertrophy of hamycin.

6. A processfor the treatment of prostatic hyertrophy in a mammal afilicted with prostatic hypertrophy which comprises orally administering to said mammal an effective dose for treating prostatic hypertrophy of trichomycin.

7. A process for the treatment of prostatic hypertrophy in a mammal afiiicted with prostatic hypertrophy which comprises orally administering to said mammal an efiective dose for treating prostatic hypertrophy of candidin.

8. A process for the treatment of prostatic hypertrophy in a mammal afiiicted with prostatic hypertrophy which comprises orally administering to said mammal an effective dose for treating prostatic hypertrophy of ayfactin.

9. A process for the treatment of prostatic hypertrophy in a mammal atfiicted with prostatic hypertrophy which comprises orally'administering to said mammal an effective dose for treating prostatic hypertrophy of fungimycin.

References Cited UNITED STATES PATENTS 3,081,233 3/1963 'Enz 167-82 3,244,590 4/1966 Schaifner 167-65 FOREIGN PATENTS 783,486 11/1955 Great Britain.

OTHER REFERENCES Louria, Donald-B.: Antibiotics and Chemotherapy, v01. 5, No. 5, pp. 295-301 (1958).

Oswald, Eliz. J. et al.: Antibiotics Annual 1955-1956, PP. 236-239 (1956).

Sakamoto, Jean Marie 1.: J. of Antibiotics, vol. 12, No. 1, pp. 21-23 (1959).

Kligman, Albert M. et al.: Proc. Soc. Exp. Biol. Med., vol. 82, pp. 399-404 (1953).

Lynch, Harold J. et al.: Antimicrobial Annual, 1960, pp..551-557 (1960).

Ramachandran, S.: Hindustan Journ. of Antibiotics, vol. 4, pp. 74-79 (1961).

Physicians Desk Reference, Medical Economics, Oradell, NJ. (1965), p. 905.

Remingtons Practice of Pharmacy, Eric Martin et a1., Mack Pub. Co., Easton, Pa., p. 1179 (1961).

Gordon et al.: Proc. Nat. Acad. Sci., vol. 60, No. 4, pp. 1201-8 (August 1968).

Schaflner et al.: Proc. Nat. Acad. Sci., vol. 61, No. 1, pp. 36-41.

JEROME D. GOLDBERG, Primary Examiner US. Cl. X.R.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent 3. 584 .113 Dated H m R, 9. 1

Inventor(s) W0 mm mm It is certified that error appears In the above-identified pnu-nl and that said Letters Patent are hereby corrected as shown b010w:

Col. 3, line 56, change "includes" to include Col. 3, line 73, change "compromise" to comprise Col. 6, line 12, change "of" to and Col. 7, line 21, change "reaction" to reactions Eigned and sealed this 17th day of September 1974.

(SEAL) Attest:

McCOY M. GIBSON JR. C. MARSHALL DANN attesting Officer Commissioner of Patents USCOMM-DC GUESTS-P09 FOPM O-O50 10-69! a u s covsnuuem Pnlrmus OFFICE 1909 o-3ss-ss4 

